A few observations ...
The camera was driven by automobile, rather than by cable car as in the earlier pre-earthquake footage (http://www.archive.org/details/TripDown1905)
-- there are places where the auto changes to the other side of the street to avoid obstructions (debris, people, etc.) and no crossover/switch was seen. It's not a cable car as in the earlier footage because in places the track and/or the cable slot are damaged. It's also not a horse dray because the animal isn't at all visible (and a pushed vehicle would not have been as steady).
It's difficult to say whether this was shot at the same frame rate or that the car moved at the same speed. (BTW, the camera in the earlier footage traveled at the same speed as the cable in the slot, i.e
. 9 miles per hour.) It is, however, remarkable that a side-by-side comparison was so quickly organized and created with just as much care as the pre-quake version.
The quality of the film's processing and/or archiving shows less care than the pre-earthquake footage, and would be consistent with the post-quake lack of facilities and lab capability. It is likely that this was photographed by the same people who made the earlier version, perhaps to record the damage for posterity, and then they may have changed their minds about the possibility that a side-by-side comparison might disfavor the city at a time when venture capital was desperately sought for the reconstruction. If so, they might likely have merely stored the footage and forgotten it, while there is a real probability the pre-earthquake footage was re-circulated as a promotional bid for capital investment.
It is highly probable that the people in this footage were aware of the earlier film, which would have been a crowd pleaser and box-office draw. That these people so willingly moved out of the way of the camera car suggests they were not surprised by it and wanted to make sure this film had the same impact (there is no other reason to suggest why they didn't numerous times halt the camera car when it is clear they could/would/should have)).